The Civil War (1861-1865) was nothing less than a revolutionary reorganization of American government, society, and economics. It claimed almost as many lives as every other U.S. conflict combined and, by war's bloody logic, forged the nation which the Founding Fathers could not by settling once and for all lingering national questions about state sovereignty and slavery. The postwar period, however, was one of arguably greater turmoil than the war itself. This is because many men in the South did not, in fact, lay down their arms at the end of the War. What’s more, freedmen, former slaves that were...